21312928

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^2\times {\mathrm{563}}^1$

素因数の和:606

約数の個数: 72

約数和(自身を含む): 52018848

約数和(自身を除く): 30705920

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 169, 182, 208, 224, 338, 364, 416, 563, 676, 728, 1126, 1183, 1352, 1456, 2252, 2366, 2704, 2912, 3941, 4504, 4732, 5408, 7319, 7882, 9008, 9464, 14638, 15764, 18016, 18928, 29276, 31528, 37856, 51233, 58552, 63056, 95147, 102466, 117104, 126112, 190294, 204932, 234208, 380588, 409864, 666029, 761176, 819728, 1332058, 1522352, 1639456, 2664116, 3044704, 5328232, 10656464, 21312928]

約数ペア:

[(1, 21312928), (2, 10656464), (4, 5328232), (7, 3044704), (8, 2664116), (13, 1639456), (14, 1522352), (16, 1332058), (26, 819728), (28, 761176), (32, 666029), (52, 409864), (56, 380588), (91, 234208), (104, 204932), (112, 190294), (169, 126112), (182, 117104), (208, 102466), (224, 95147), (338, 63056), (364, 58552), (416, 51233), (563, 37856), (676, 31528), (728, 29276), (1126, 18928), (1183, 18016), (1352, 15764), (1456, 14638), (2252, 9464), (2366, 9008), (2704, 7882), (2912, 7319), (3941, 5408), (4504, 4732)]